Results 61 to 70 of about 5,368 (195)

Introduction to very-long-baseline interferometry [PDF]

Proceedings of the IEEE, 1973
Long-baseline interferometry achieves high resolution by using two or more widely separated radio telescopes and recording video signals on magnetic tapes, which are later brought together and cross-correlated. This paper contains discussions of the coherence and timing requirements and of calibration procedures.
openaire   +2 more sources

Cleaning Efficacy and Surface Alterations of Titanium and Zirconia Implant Abutments Following Mechanical Instrumentation: An In Vitro Study

Clinical Oral Implants Research, EarlyView.
ABSTRACT Objectives To evaluate the cleaning efficacy, quantitative and qualitative surface modifications of titanium (Ti) and zirconia (Zr) abutments following instrumentation with twelve mechanical instrumentation modalities. Materials and Methods Twenty‐four Ti and twenty‐four Zr abutments were divided by marginal grooves into 36 test and 12 control
Marina Salah Kamel, Axel Spahr, Tim Badgery‐Parker, Tihana Divnić‐Resnik   +3 more
wiley   +1 more source

Direct Imaging of a Toroidal Magnetic Field in the Inner Jet of NRAO 150

Galaxies, 2016
Most formation models and numerical simulations cause a helical magnetic field to form, accelerate and collimate jets in active galactic nuclei (AGN). For this reason, observational direct evidence for the existence of these helical magnetic fields is of
Sol N. Molina, Iván Agudo, José L. Gómez, Thomas P. Krichbaum, Iván Martí-Vidal, Alan L. Roy   +5 more
doaj   +1 more source

Long-Baseline Atom Interferometry

Submission to the 2026 update of the European Strategy for Particle Physics on behalf of the TVLBAI Proto-Collaboration: V2: Minor corrections to author ...
Balaž, Antun, Blas, Diego, Buchmueller, Oliver, Calatroni, Sergio, Caramete, Laurentiu-Ioan, Cerdeño, David, Chiofalo, Maria Luisa, Di Pumpo, Fabio, Djordjevic, Goran, Ellis, John, Fayet, Pierre, Foot, Chris, Gaaloul, Naceur, Gardner, Susan, Garraway, Barry M, Gauguet, Alexandre, Giese, Enno, Hogan, Jason M, Hosten, Onur, Kehagias, Alex, Kilian, Eva, Kovachy, Tim, Lacasta, Carlos, Lewicki, Marek, Lopez Asamar, Elias, Lopez-Gonzalez, J.Luis, Lundblad, Nathan, Maggiore, Michele, Mccabe, Christopher, Mcferran, John, Mileti, Gaetano, Millington, Peter, Morley, Gavin W, Odž, Senad, Overstreet, Chris, Pawlowski, Krzysztof, Pelucchi, Emanuele, Rafelski, Johann, Roura, Albert, Safronova, Marianna S, Schreck, Florian, Sergijenko, Olga, Singh, Yeshpal, Soares-Santos, Marcelle, Stergioulas, Nikolaos, Tino, Guglielmo M, Tinsley, J.N, Ulbricht, Hendrik, van der Grinten, Maurits, Vaskonen, Ville, von Klitzing, Wolf, Xuereb, André, Cruzeiro, Emmanuel Zambrini   +52 more
openaire   +4 more sources

Hyperspectral tomographic diffractive microscopy: Development and applications

Journal of Microscopy, EarlyView.
Abstract Tomographic Diffractive Microscopy (TDM) provides label‐free three‐dimensional imaging of transparent samples with resolution surpassing confocal limits. At IRIMAS, successive instrumental developments since 2009 have enhanced TDM capabilities through transmission, reflection, isotropic, polarisation‐sensitive, and dual‐view configurations ...
Leonardo Pestana Legori, Carlos Alberto Chacón Ávila, Matthieu Debailleul, Nicolas Verrier, Olivier Haeberlé   +4 more
wiley   +1 more source

Practical approach to extending baselines of telescopes using continuous-variable quantum information

New Journal of Physics
Interferometric telescopes are instrumental for the imaging of distant astronomical bodies, but optical loss heavily restricts how far telescopes in an array can be placed from one another, leading to a bottleneck in the resolution that can be achieved ...
Bran Purvis, Randy Lafler, R Nicholas Lanning   +2 more
doaj   +1 more source

Repeatable Velocity Fine Structure of Lightning K‐Leaders From a Single VHF Interferometer Made Three‐Dimensional

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract K‐processes re‐illuminate lightning channels at speeds of order 107 m s−1, but measuring their three‐dimensional (3‐D) propagation velocity has required multi‐station systems available at few sites. An error‐isomorphism range inversion upgrades a single very‐high‐frequency interferometer (INTF) into a 3‐D imager: Lightning Mapping Array (LMA ...
Xiangpeng Fan, Jie Shi, Yajun Li, Yijun Zhang, Paul R. Krehbiel, Guo Zhao, Tong Zhang, Jun Liu, Xiaoxin Li   +8 more
wiley   +1 more source

Supermassive Black Hole Spin Constraints from Polarimetry in an Equatorial Disk Model

The Astrophysical Journal Letters
The Event Horizon Telescope has released polarized images of the supermassive black holes Messier 87* (M87*) and Sagittarius A* accretion disks. As more images are produced, our understanding of the average polarized emission from near the event horizon ...
Daniel C. M. Palumbo
doaj   +1 more source

Multiplicity of Northern bright O-type stars with optical long baseline interferometry. Results of the pilot survey. [PDF]

Proc Int Astron Union, 2023
Lanthermann C.
europepmc   +1 more source

Assessing Co‐Located NISAR and Sentinel‐1 Observations for Atmospheric Characterization

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 19, 16 October 2026.
Abstract Tropospheric delay remains one of the largest sources of uncertainty in repeat‐pass Interferometric Synthetic Aperture Radar (InSAR) measurements, while accurate three‐dimensional deformation retrieval continues to be limited by the geometry of current spaceborne SAR systems.
Shadi Oveisgharan, Paul Rosen, Christopher Wells, Emre Havazli   +3 more
wiley   +1 more source